The Belgrade Higher Public Prosecutor's Office has announced it is directing the police to identify and question all persons who publicly claimed a sound cannon was used against protesters on March 15, 2025 - as well as those who organized medical examinations of those present. The actions are conducted under suspicion of preparing an act against the constitutional order and security of Serbia, and are based on a narrative first put forward in a report by Russia's Federal Security Service. The announcement comes fifteen months after the incident, during which the case remained in pre-investigation status, without charges against those who allegedly deployed the weapon. Military analyst Aleksandar Radić, one of the most prominent commentators on the case, had multiple locations searched by police on June 22; the following day, he was summoned to the Military Police for forensic analysis of his seized computers. Editor-in-chief of srbin.info Dejan Zlatanović and a lawyer Aleksandar Olenik were also summoned for questioning by the police.

The prosecution's actions are running in full coordination with statements by President Vučić, National Assembly Speaker Ana Brnabić, other ruling party officials, and media aligned with the authorities, which have launched special broadcasts and published numerous articles claiming the incident was staged. Brnabić stated that allegations about acoustic weapons were intended to portray President Vučić as a killer and to threaten him and his family.